نتایج جستجو برای: double ring resonator

تعداد نتایج: 368071  

Journal: :آب و خاک 0
علیرضا سپهوند مجید طایی سمیرمی سیّدخلاق میرنیا حمیدرضا مرادی

abstract infiltration is one of the most important phenomena which is affected by the soil physical and hydraulic characteristics. measurement of infiltration needs the high cost and is time consuming, therefore estimation of infiltration is necessary. also, due to variability of soil moisture, it is important to determine the appropriate model for the estimating the infiltration rate. the pres...

Journal: :بینا 0
سیامک دلفزای باهر s delfazayebaher ophthalmic research center, shahid beheshti university of medical sciences, tehran, iranدانشگاه علوم پزشکی شهید بهشتی- تهران- ایران سپهر فیضی s feizi shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی- تهران- ایران محمدعلی جوادی ma javadi shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی- تهران- ایران محمدرضا جعفری نسب mr jafarinasab shahid beheshti university of medical sciencesمرکز تحقیقات اپیدمیولوژی بیماری های چشم- دانشگاه علوم پزشکی شهید بهشتی- تهران- ایران علیرضا برادران رفیعی ar baradaran rafii shahid beheshti university of medical sciencesمرکز تحقیقات مهندسی بافت چشم- دانشگاه علوم پزشکی شهید بهشتی- تهران- ایران محمدمهدی صدوقی mm sadoghi shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی- تهران- ایران امیر فرامرزی

purpose: to describe a new noninvasive method to assure correct orientation of donor lenticules in descemet stripping automated endothelial keratoplasty (dsaek) surgery. methods: dsaek surgery was performed in three eyes with the diagnosis of pseudophakic bullous keratopathy (pbk). for the laboratory part of the study, two whole globes and two precut corneoscleral buttons were used. the donor l...

2015
Xu Sun Daoxin Dai Lars Thylén Lech Wosinski

An ultra-high sensitivity double-slot hybrid plasmonic (DSHP) ring resonator, used for optical sensors and modulators, is developed. Due to high index contrast, as well as plasmonic enhancement, a considerable part of the optical energy is concentrated in the narrow slots between Si and plasmonic materials (silver is used in this paper), which leads to high sensitivity to the infiltrating mater...

In this design an optical ring resonator are embedded between two Horizontal input and output waveguides which has 4 orbitals around the center of the resonator so that each orbital consists of 8 rods with different size in which radius of larger orbitals rods are bigger than radius of smaller orbitals rods. The analysis of simulation results showed the proposed filter has the transmission effi...

Ring resonators have always been referred to as a highly flexible structurefor designing optical devices. In this study, we have designed and simulation a fourchannel optical demultiplexer using square photonic crystal ring resonator. The squarelattice constant for this purpose structure is used. The purposed structure has an averagecrosstalk, transmission coefficient, q...

Journal: :Optics letters 2017
Akhilesh S P Khope Takako Hirokawa Andrew M Netherton Mitra Saeidi Yujie Xia Nicolas Volet Clint Schow Roger Helkey Luke Theogarajan Adel A M Saleh John E Bowers Rod C Alferness

We present an on-chip wavelength reference with a partial drop ring resonator and germanium photodetector. This approach can be used in ring-resonator-based wavelength-selective switches where absolute wavelength alignment is required. We use the temperature dependence of heater resistance as a temperature sensor. Additionally, we discuss locking speed, statistical variation of heater resistanc...

2017
Alessia Pasquazi Raja Ahmad Martin Rochette Michael Lamont Brent E. Little Sai T. Chu Roberto Morandotti David J. Moss

We present the first system penalty measurements for all-optical wavelength conversion in an integrated ring resonator. We achieve wavelength conversion over a range of 27.7nm in the C-band at 2.5 Gb/s by exploiting four wave mixing in a CMOS compatible, high index glass ring resonator at ~22 dBm average pump power, obtaining < 0.3 dB system penalty.

Journal: :international journal of electrical and electronics engineering 0
mostafa danaeian department of electrical engineering, shahid bahonar university of kerman, kerman, iran. masoud movahhedi electrical and computer engineering department, yazd university, yazd, iran. ahmad hakimi department of electrical engineering, shahid bahonar university of kerman, kerman, iran. kambiz afrooz department of electrical engineering, shahid bahonar university of kerman, kerman, iran

a compact and sharp-rejection ultra-wideband (uwb) microstrip band-pass filter (bpf) is developed using of left handed metamaterials realized by complementary split ring resonator (csrr). moreover, proposed structure consists of two doublets parallel coupling gaps at each side of a microstrip ring. in comparison with some other filters, this structure shows a significantly wider passband due to...

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